Assembling device



E. R. BERRY- ASSEMBLING DEVICE.

APPLICATION FILED JAN.10, 1920.

Patentgd Aug. 2, 1921.

EMORYVR. BERRY, or DAVENPORT, IOWA.

ASSEMBLIN G DEVICE Specification of Letters Patent. Application filed January 10, 1920. Serial No.

Patented Aug. 2, 1921. 350,675.

(FILED UNDER THE ACT or MARCH 3, 1883, 22 STAT. L., 625.

To all to 7mm it may concern:

Be it known that I, EMORY R. BERRY, a citizen of the United States and a resident of Davenport, county of Scott, State of Iowa, have invented an Improvement in Assembling Devices, of which the following is a specification.

The invention described herein may be used by the overnment, or any of its officers or employees in prosecution of work for the Government, or by any other person in the United States, without payment to me of any royalty thereon.

is invention relates to an improved mechanism intended primarily for assembling the floating piston within the recuperator cylinder of a hydropneumatic recoil system of a gun.

Previous to this invention it was common practice to force the piston within the cylinder by driving it by means of a sledgehammer. Such an operation not only consumes considerable time and labor, but is also likely to batter the surfaces of the piston thereby interfering with the proper functioning of the recuperator mechanism.

In the following specification reference is made to the accompanying drawing, the figure of which is a side elevation of a preferred form of my invention, certain parts being shown in vertical section.

The numeral 1 designates a conventional form of work bench secured to the floor or wall of a shop, and on this work bench is mounted the cradle of a gun consisting of the gun slide rails 2 and a recuperator cylinder 3.

The numeral 4 designates a portable table mounted on the rollers 5. This table is substantially constructed so as to support air cylinder 6 and piston 7. The cylinder 6 is closed at one end by means of the cylinder head 8 and at the other end by the cylinder head 9 and stufling box and flange 10 through which passes the piston rod 11. The cylinder heads 8 and 9 are provided with screwthreaded openings for connection with pipes 12 and 13. These pipes are connected with conduits 14 and 15 which lead to the control valve 16. The pipe 17 connects control valve 16 with a reservoir containing compressed air. tion if desired. The valve 16 has an operating arm 18 secured thereto and the valve is v and is adapted also to This may be a flexible connec normally held in inoperative means of the tension spring 19 connected to the arm 18 and to a hook 2O adjustably secured on pipe 17 by means of the set-screw he cylinder 6 is maintained securely on the portable table 4 by means of the clips 22 which engage studs projecting from blocks having arcuate openings therein.

YVhen in operative position the portable table is secured to the work bench b of a chain or cable 23 which is secured to the portable table by means of the eye 24,

engage a hook 25 attached to the work bench.

The portable table is placed in such position that the piston rod will be in longitudinal alinement with the axis of the recuperator cylinder. one end in a ball 26, which en ages a correspondlng socket 27 formed in one end of a connecting head 28. -The head 28 is screw threaded at its socket end for receiving the threaded end of a flanged link 32 that is mounted for universal movement on the ball end of the piston rod. The opposite end of the head 28 is bored so as to form an opening in which the projecting end of the floating piston may have clearance. The annular end of the head 28 is adapted to engage the end 30 of the floating piston, whichend usually abuts the packing of the piston and is held securely in place by the nut 31. The head 28 has mounted thereon a bushing 33 for guiding the same as the piston is forced into the recuperator cylinder and the link 32 is also provided with a ring 34 of bronze or like material for preventing the scratching or marring of the interior surface of the recuperator cylinder.

In operation the portable table 4 with the air cylinder mounted thereon is moved into the vicinity of the work bench and secured thereto in proper position by means of the chain 23. The piston 7 is moved to the end of the air cylinder corresponding to the cylinder head 8. The head 28 is placed in position so as to abut the end 30 of the recuperator piston and the head is then secured to the ball end of the piston-rod by means of the connecting link 32. The control valve 16 is then moved so as to admit air between piston head 8 and piston 7 which will force the piston 7 on its working stroke and correspondingly, but with a sort of position by cushioning effect, force the floating piston into the recuperator cylinder. To return the piston to normal position after the completion of the operation it is only necessary.

to direct air" to the other side of the piston, which moveto turn the control valve so as ment of the valve will connect the working side of the piston to the atmosphere, itbeing understood that the control valve is of the usual type for controlling "four passages, one leading to the end of the cylinder corresponding to cylinder-heads, another to cylinder-head 9, another to the supply of compressed air and the other passage leading to theatmosphere. Upon releasing the valve, itis returned to inoperative position by. the spring 19.

In order to prevent the leakage of thev liquid or gas contalned within the recuperator cylinder'of the type referred to in this application, the packing employed around I the piston is urged outwardly against the cylinder walls with a considerable pressure. This renders the problem of assembling the floating piston within the cylinder without injury to the fine degree of machine work very difllcult, but it has been found, that the result can be accomplished very satisfaccuperator system torily by the mechanism above described with a great saving in time and material.

"While my invention has been described in connection with the floating piston ofa reits use for other purposes is. contemplated and embraced within the scope of the appended claims.

Having-described my invention, what I claimas new and. desire to secure by Patent, is

1. In a device for inserting a floatingpiston in a cylinder, a portable table, aflexible connection for anchoring the table, an air motor mounted on the portable table and a head flexibly secured to the piston-rod of saidmotor for "forcing said floating piston within the cylinder. y

2. In a device for inserting a floating piston in a cylinder, a fixed support, a portable table, a flexible connection forsecuring the portable table to said. support, an air motor mounted on said portable table having a piston rod and a member mounted on said piston rod for contacting with said floating piston and transmitting pressure from said piston rod! EMORY a BERRY.

Letters 

